What impact will rehabilitation have on a person's permanent disability rating?

[666 P.2d 995] In most cases, the provision of rehabilitation benefits will have a significant impact on an injured employee's ability to compete. If job training makes it possible for a worker to compete in a new sector of the labor market for which he or she was previously unprepared, the worker's permanent disability rating and award will reflect this fact. (See Moyer v. Workmen's Comp. Appeals Bd. (1973) 10 Cal.3d 222, 234, and fn. 10, 110 Cal.Rptr. 144, 514 P.2d 1224 in which this court recognized that former section 139.5 explicitly provided what is inherent in the current statutory scheme--[almost "the result (of participation in a vocational rehabilitation program) will be a reduced permanent disability rating."].)